A PDF field guide to the species reported in and around St. Vrain State Park, with common and scientific names and up to 3 photos of each, laid out for use in the field and offline.
The animals people report most often in and around st. Vrain State Park include Canada Goose, Red-Winged Blackbird, Osprey, American White Pelican and Eastern Kingbird. Birds lead the list with 22 species, followed by 14 plants and 10 insects.
The 20 species reported most often here, of 50 in the full guide.

Canada Goose

Greek Milkweed

Red-Winged Blackbird
Osprey
Tell me what you're looking for, and I'll do my best to answer.
American White Pelican
Eastern Kingbird

Cackling Goose
Broadleaved Pepperweed
Kildeer
Mullein
Honeybee
Golden Currant

Cottonwood

Disc Mayweed
Bow
Tell me what you're looking for, and I'll do my best to answer.

Catnip
American Robin